Seasonal variation in the response to a toxin-producing cyanobacteria in Daphnia
(2022) In Freshwater Biology 67(6). p.1035-1044- Abstract
Many populations of water fleas (Daphnia) are exposed to algal blooms dominated by microcystin-producing cyanobacteria. However, the severity of these effects on Daphnia fitness remain poorly understood in natural populations. We investigated seasonal changes in body size, reproduction and survival of D. longispina individuals from five eutrophic lakes in southern Sweden. We tested whether individuals collected before, during or following algal blooms differed in their reproduction and survival when experimentally exposed to microcystin-producing cyanobacteria. The concentration of microcystin in the lakes was significantly higher during summer and autumn compared to spring, but there were substantial differences between lakes. The... (More)
Many populations of water fleas (Daphnia) are exposed to algal blooms dominated by microcystin-producing cyanobacteria. However, the severity of these effects on Daphnia fitness remain poorly understood in natural populations. We investigated seasonal changes in body size, reproduction and survival of D. longispina individuals from five eutrophic lakes in southern Sweden. We tested whether individuals collected before, during or following algal blooms differed in their reproduction and survival when experimentally exposed to microcystin-producing cyanobacteria. The concentration of microcystin in the lakes was significantly higher during summer and autumn compared to spring, but there were substantial differences between lakes. The reproductive output of individuals declined consistently over the season, and this decline was stronger for Daphnia collected during periods of, or from lakes with, high microcystin concentration. There was little evidence that individuals adapted to the toxin over the season. The strong seasonal changes in body size, reproduction and survival in these D. longispina appear to be caused partly by variation in the abundance of toxin-producing cyanobacteria. Populations were unable to adapt sufficiently quickly during summer and autumn to recover from the negative effects of microcystin. We therefore suggest that seasonal increases in tolerance to microcystin-producing cyanobacteria have limited effects on the eco-evolutionary dynamics between Daphnia and phytoplankton.
(Less)
- author
- Hegg, Alexander LU ; Radersma, Reinder LU and Uller, Tobias LU
- organization
- publishing date
- 2022-06
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- adaptation, cyanobacteria, microcystin, seasonality, tolerance
- in
- Freshwater Biology
- volume
- 67
- issue
- 6
- pages
- 10 pages
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:85126024749
- ISSN
- 0046-5070
- DOI
- 10.1111/fwb.13899
- language
- English
- LU publication?
- yes
- additional info
- Funding Information: This research was funded by a Wallenberg Academy Fellowship from the Knut and Alice Wallenberg Foundation to TU and a research grant from the John Templeton Foundation (60501). We are grateful to Xi Yang for his valuable help during the field sampling. We thank Karin Rengefors and Lars-Anders Hansson for their useful advice and comments on a draft of this manuscript. The editor and three anonymous reviewers provided valuable feedback on the manuscript. We also thank Marie Svensson, Emma Kritzberg and Johan Hollander for their logistic support. Funding Information: This research was funded by a Wallenberg Academy Fellowship from the Knut and Alice Wallenberg Foundation to TU and a research grant from the John Templeton Foundation (60501). Publisher Copyright: © 2022 The Authors. Freshwater Biology published by John Wiley & Sons Ltd.
- id
- 6216bb67-a0a1-49f4-a74c-56d344e4f3f7
- date added to LUP
- 2022-12-30 11:50:22
- date last changed
- 2022-12-30 11:50:22
@article{6216bb67-a0a1-49f4-a74c-56d344e4f3f7,
abstract = {{<p>Many populations of water fleas (Daphnia) are exposed to algal blooms dominated by microcystin-producing cyanobacteria. However, the severity of these effects on Daphnia fitness remain poorly understood in natural populations. We investigated seasonal changes in body size, reproduction and survival of D. longispina individuals from five eutrophic lakes in southern Sweden. We tested whether individuals collected before, during or following algal blooms differed in their reproduction and survival when experimentally exposed to microcystin-producing cyanobacteria. The concentration of microcystin in the lakes was significantly higher during summer and autumn compared to spring, but there were substantial differences between lakes. The reproductive output of individuals declined consistently over the season, and this decline was stronger for Daphnia collected during periods of, or from lakes with, high microcystin concentration. There was little evidence that individuals adapted to the toxin over the season. The strong seasonal changes in body size, reproduction and survival in these D. longispina appear to be caused partly by variation in the abundance of toxin-producing cyanobacteria. Populations were unable to adapt sufficiently quickly during summer and autumn to recover from the negative effects of microcystin. We therefore suggest that seasonal increases in tolerance to microcystin-producing cyanobacteria have limited effects on the eco-evolutionary dynamics between Daphnia and phytoplankton.</p>}},
author = {{Hegg, Alexander and Radersma, Reinder and Uller, Tobias}},
issn = {{0046-5070}},
keywords = {{adaptation; cyanobacteria; microcystin; seasonality; tolerance}},
language = {{eng}},
number = {{6}},
pages = {{1035--1044}},
publisher = {{Wiley-Blackwell}},
series = {{Freshwater Biology}},
title = {{Seasonal variation in the response to a toxin-producing cyanobacteria in Daphnia}},
url = {{http://dx.doi.org/10.1111/fwb.13899}},
doi = {{10.1111/fwb.13899}},
volume = {{67}},
year = {{2022}},
}